Unable to build poetry python package for system-wide use

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I want to install python package (GitHub - crabvk/bar-gmail: A Polybar module to show unread messages from Gmail) on system level. I’ve got working results for non-poetry packages but struggling with poetry ones.

Current state of my module:

{ inputs, config, lib, pkgs, ... }:
let
  # Create an overriden python that has our custom package
  python312 = pkgs.python312.override {
    self = python312;
    packageOverrides = self: super: {
      bar-gmail = self.buildPythonPackage rec {
        pname = "bar-gmail";
        format = "pyproject";
        version = "1.0.5";
        src = pkgs.fetchFromGitHub {
          owner = "crabvk";
          repo = "bar-gmail";
          rev = "ca33c40240fbf563c723ff19b3e0feae42f6160a";
          sha256 = "0rs9bxxrw4wscf4a8yl776a8g880m5gcm75q06yx2cn3lw2b7v22";
        }; 
        doCheck = false;
        nativeBuildInputs = [ self.poetry-core ];
        buildInputs = [
          self.google-api-python-client
          self.google-auth-httplib2
          self.google-auth-oauthlib
          self.dasbus
          self.pygobject3
          self.poetry-core
        ];
      };
    };
  };
in
{
  options = {
    nyx.work.enable = 
      lib.mkEnableOption "enables work related packages";
  };

  config = lib.mkIf config.nyx.work.enable {
    environment.systemPackages = with pkgs; [
      poetry

      (python312.withPackages (ps: with ps; [
        numpy
        scipy
        pip
        ps.bar-gmail
        # working example
        # (python39.pkgs.buildPythonPackage rec {
        #   pname = "findiff";
        #   version = "0.9.2";

        #   src = fetchPypi {
        #     inherit pname version;
        #     sha256 = "sha256-IWqQhGv+8d3mYdnwJh1byj0su2c0K5fpMTylsvR4c2U=";
        #   };

        #   doCheck = false;

        #   buildInputs = [
        #     numpy
        #     scipy
        #     sympy
        #   ];
        # })
    ];
  };
}

Error i get:

error: builder for '/nix/store/4nvb31h32qym2rsa8nc7smwdikf2ayjf-python3.12-bar-gmail-1.0.5.drv' failed with exit code 1;
       last 10 log lines:
       > source root is source
       > setting SOURCE_DATE_EPOCH to timestamp 315619200 of file source/src/windows/versioninfo.rc
       > Running phase: patchPhase
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > no configure script, doing nothing
       > Running phase: buildPhase
       > Executing pypaBuildPhase
       > Creating a wheel...
       > ERROR Source /build/source does not appear to be a Python project: no pyproject.toml or setup.py
       For full logs, run 'nix log /nix/store/4nvb31h32qym2rsa8nc7smwdikf2ayjf-python3.12-bar-gmail-1.0.5.drv'.
error: 1 dependencies of derivation '/nix/store/x2p50b953zldiivnk8xhwzq6ih4raj4k-python3-3.12.3-env.drv' failed to build
error (ignored): error: cannot unlink '/tmp/nix-build-python3.12-3.12.3-doc.drv-4/Python-3.12.3/Lib': Directory not empty
error: 1 dependencies of derivation '/nix/store/fpql2aj2q6klmlpgy5l3dwnfsskz93sv-system-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/ix4gizd7n0r7qwnp7s0v3rnkp3jxvdgq-nixos-system-sphHpNixos-24.11.20240612.57d6973.drv' failed to build

it says that pyproject.toml not found, but project clearly have it: